package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
   private SetmealDishService setmealDishService;

    @Override
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐基本信息 操作setmeal 执行insert操作
        this.save(setmealDto);


        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes= setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        //保存套餐和菜品的关联信息 操作setmeal_dish 执行 insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    /**
     * 删除套餐,同时需要删除套餐和菜品的关联数据
     * @param ids
     */
    @Override
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态 确定是否可用删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);

        int count = this.count(queryWrapper);
        if (count > 0 ){
            //如果不能删除 抛出一个业务异常
            throw new CustomException("套餐正在售卖中,不能删除");

        }

        //如果可以删除,先删除套餐表中的数据 --setmeal
        this.removeByIds(ids);

        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();

        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
        //删除关系表中的数据
        setmealDishService.remove(lambdaQueryWrapper);

    }

    @Override
    public SetmealDto getByIdWithDish(Long id) {
        //先获取基本数据信息
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto = new SetmealDto();


        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,id);
        List<SetmealDish> setmealDishes = setmealDishService.list(queryWrapper);
        BeanUtils.copyProperties(setmeal,setmealDto);
        setmealDto.setSetmealDishes(setmealDishes);

        return setmealDto;
    }

    @Override
    public void updateWithDish(SetmealDto setmealDto) {
        //先修改基本信息
        this.updateById(setmealDto);

        //删除原有表中的菜品
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);

        //添加新的菜品信息到表中
        //先获取前端传过来的菜品信息
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes = setmealDishes.stream().map((item->{
            item.setSetmealId(setmealDto.getId());
            return item;
        })).collect(Collectors.toList());
        //再修改菜品信息
        setmealDishService.saveBatch(setmealDishes);

    }
}
